Home > Basic Circuits >Sensor Circuits > High impedance pH detection amplifier circuit

High impedance pH detection amplifier circuit

Source: InternetPublisher:smallembedded Keywords: Amplification circuit impedance OPA Updated: 2021/12/23

8. High<strong>Impedance</strong>PH value detection<strong>Amplification<strong>Circuit</strong></strong>.gif

The pH value is a measure of the acidity or alkalinity of a solution. As shown in the circuit shown in the figure,
when the pH probe comes into contact with the solution being measured, its resistance value will change according to the strength of the acid and alkali. This change forms a current at pin ③, which is amplified by OPA 111
and outputs a voltage signal. The gain of the circuit is determined by R2/Ri.

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

About Us Customer Service Contact Information Datasheet Sitemap LatestNews


Room 1530, 15th Floor, Building B, No.18 Zhongguancun Street, Haidian District, Beijing, Postal Code: 100190 China Telephone: 008610 8235 0740

Copyright © 2005-2024 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号